Description: tSIP is an open source SIP softphone and SIP client for making VoIP calls and sending instant messages over the Internet. It supports standard SIP features like audio/video calling, instant messaging, presence, and more.
Type: software
Pricing: Open Source
Description: Ubuntu is a free and open source Linux distribution based on Debian. It is easy to use, highly customizable, and has a large community supporting it.
Type: software
Pricing: Free